I suppose you could get a trusted friend to change your password and not tell you the new password. That would lock you out of your current account, but it would not be difficult for you to open a new account. The fact is, you can always get back on if you want to. If you want out, you just have to make up your mind to stay away.
Why don’t you take up a new activity or hobby, preferably one that does not involve a flat screen. Learn to play a musical instrument, read some good books, go to a fitness center or take a walk, volunteer at a senior citizen’s center, … or what would you like to do?